21332451435144 has 16 divisors (see below), whose sum is σ = 53331128587920. Its totient is φ = 7110817145040.

The previous prime is 21332451435047. The next prime is 21332451435179. The reversal of 21332451435144 is 44153415423312.

It is a junction number, because it is equal to n+sod(n) for n = 21332451435096 and 21332451435105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444426071542 + ... + 444426071589.

It is an arithmetic number, because the mean of its divisors is an integer number (3333195536745).

Almost surely, 2^{21332451435144} is an apocalyptic number.

21332451435144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21332451435144 is an abundant number, since it is smaller than the sum of its proper divisors (31998677152776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21332451435144 is a wasteful number, since it uses less digits than its factorization.

21332451435144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888852143140 (or 888852143136 counting only the distinct ones).

The product of its digits is 691200, while the sum is 42.

Adding to 21332451435144 its reverse (44153415423312), we get a palindrome (65485866858456).

The spelling of 21332451435144 in words is "twenty-one trillion, three hundred thirty-two billion, four hundred fifty-one million, four hundred thirty-five thousand, one hundred forty-four".